from django.db import models

# Create your models here.
class Topic(models.Model):
    ''' 用户学习的主题 '''
    text = models.CharField(max_length=200)
    date_added = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        ''' 返回模型的字符串表示 '''
        return self.text